<template>
<div>
  <!--面包屑导航区-->
  <el-breadcrumb separator="/">
    <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
    <el-breadcrumb-item>商品管理</el-breadcrumb-item>
    <el-breadcrumb-item>添加商品</el-breadcrumb-item>
  </el-breadcrumb>
  <!--卡片视图区域-->
  <el-card>
<!--    提示区-->
    <el-alert
      title="添加商品信息"
      type="info"
      center
      show-icon
      :closable="false"
    >
    </el-alert>
<!--    步骤条区-->
    <el-steps
      :space="200"
      :active="activeIndex - 0"
      finish-status="success"
      align-center
    >
      <el-step title="基本信息"></el-step>
      <el-step title="商品参数"></el-step>
      <el-step title="商品属性"></el-step>
      <el-step title="商品图片"></el-step>
      <el-step title="商品内容"></el-step>
      <el-step title="完成"></el-step>
    </el-steps>

<!--    tab栏区域-->
    <el-form
      :model="addForm"
      :rules="addFormRules"
      ref="addFormRef"
      label-width="100px"
      label-position="top"
    >
    <el-tabs
      :tab-position="'left'"
      v-model="activeIndex"
      :before-leave="beforeTableave"
      @tab-click="tabClicked"
    >
      <el-tab-pane label="基本信息" name="0">
        <el-form-item label="商品名称" prop="goods_name">
          <el-input v-model="addForm.goods_name" ></el-input>
        </el-form-item>
        <el-form-item label="商品价格" prop="goods_price">
          <el-input v-model="addForm.goods_price" type="number"></el-input>
        </el-form-item>
        <el-form-item label="商品重量" prop="goods_weight">
          <el-input v-model="addForm.goods_weight" type="number"></el-input>
        </el-form-item>
        <el-form-item label="商品数量" prop="goods_number" type="number">
          <el-input v-model="addForm.goods_number"></el-input>
        </el-form-item>
        <el-form-item label="商品分类" prop="goods_cat">
          <el-cascader
            v-model="addForm.goods_cat"
            :options="catelist"
            :props="{
              expandTrigger: 'hover',
              label: 'cat_name',
              value: 'cat_id',
              children: 'children'
            }"
            @change="handleChange"></el-cascader>
        </el-form-item>
      </el-tab-pane>
      <el-tab-pane label="商品参数" name="1">
        <el-form-item
          :label="item.attr_name"
          v-for="item in manyTableData"
          :key="item.attr_id">
          <el-checkbox-group v-model="item.attr_vals">
<!--            复选框组-->
            <el-checkbox
              :label="cb"
              v-for="(cb, i) in item.attr_vals"
              :key="i"
              border
            ></el-checkbox>
          </el-checkbox-group>
        </el-form-item>
      </el-tab-pane>
      <el-tab-pane label="商品属性" name="2">
        <el-form-item
          :label="item.attr_name"
          v-for="item in onlyTableData"
          :key="item.attr_id"
        >
          <el-input v-model="item.attr_vals"></el-input>
        </el-form-item>
      </el-tab-pane>
      <el-tab-pane label="商品图片" name="3">
        <el-upload
          :action="uploadUrl"
          :on-preview="handlePreview"
          :on-remove="handleRemove"
          list-type="picture"
          :headers="headersObj"
          :on-success="handleSuccess"
        >
          <el-button size="small" type="primary">点击上传</el-button>
        </el-upload>
      </el-tab-pane>
      <el-tab-pane label="商品内容" name="4">
<!--富文本编辑器-->
        <quill-editor v-model="addForm.goods_introduce"></quill-editor>
<!--添加商品的按钮-->
        <el-button type="primary" class="btnAdd" @click="add">添加商品</el-button>
      </el-tab-pane>
    </el-tabs>
    </el-form>
  </el-card>

<!--  图片预览对话框-->
  <el-dialog
    title="图片预览"
    :visible.sync="previewVisible"
    width="50%"
  >
    <img :src="previewPath" class="previwImg">
  </el-dialog>
</div>
</template>

<script>
import _ from 'lodash'
export default {
  data () {
    return {
      activeIndex: '0',
      // 添加商品的表单数据对象
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        // 商品所属分类数组
        goods_cat: [],
        // 图片的数组
        pics: [],
        // 商品的详情描述
        goods_introduce: '',
        attrs: []
      },
      addFormRules: {
        goods_name: [
          { required: true, message: '请输入商品名称', trigger: 'blur' }
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' }
        ],
        goods_weight: [
          { required: true, message: '请输入商品重量', trigger: 'blur' }
        ],
        goods_number: [
          { required: true, message: '请输入商品数量', trigger: 'blur' }
        ],
        goods_cat: [
          { required: true, message: '请选择商品分类', trigger: 'blur' }
        ]
      },
      // 商品分类列表
      catelist: [],
      // 动态参数列表数据
      manyTableData: [],
      // 静态属性列表数据
      onlyTableData: [],
      // 上传图片的Url地址
      uploadUrl: 'http://127.0.0.1:8888/api/private/v1/upload',
      // 图片上传组建的headers请求头对象
      headersObj: {
        Authorization:
        window.sessionStorage.getItem('token')
      },
      previewPath: '',
      previewVisible: false
    }
  },
  created () {
    this.getCateList()
  },
  methods: {
    // 获取所有商品分类数据
    async getCateList () {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品分类数据失败')
      }
      this.catelist = res.data
    },
    // 级联选择器变化触发
    handleChange () {
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
      }
    },
    beforeTableave (activeName, oldActiveName) {
      if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.error('请先选择商品分类')
        return false
      }
    },
    async tabClicked () {
      // 证明访问的是动态参数面板
      if (this.activeIndex === '1') {
        const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, {
          params: { sel: 'many' }
        })
        if (res.meta.status !== 200) {
          return this.$message.error('获取动态参数列表失败')
        }
        res.data.forEach(item => {
          item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
        })
        this.manyTableData = res.data
      } else if (this.activeIndex === '2') {
        const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, {
          params: { sel: 'only' }
        })
        if (res.meta.status !== 200) {
          return this.$message.error('获取静态属性列表失败')
        }
        this.onlyTableData = res.data
      }
    },
    // 处理图片预览效果
    handlePreview (file) {
      this.previewPath = file.response.data.url
      this.previewVisible = true
    },
    // 处理移除图片的操作
    handleRemove (file) {
      // 获取将要删除图片的临时路径
      const filePath = file.response.data.tmp_path
      // 从pics数组中，找到这个图片对应的索引值
      const i = this.addForm.pics.findIndex(x => x.pic === filePath)
      // 调用数组的splice方法，把脚本信息对象，从pics数组中移除
      this.addForm.pics.splice(i, 1)
    },
    // 监听图片上传成功的事件
    handleSuccess (response) {
      // 先拼接得到一个图片信息对象
      const picInfo = { pic: response.data.tmp_path }
      // 将图片信息对象，push到pics数组中
      this.addForm.pics.push(picInfo)
    },
    // 添加商品
    add () {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) {
          return this.$message.error('请填写必要的表单项')
        }
        // 执行添加业务逻辑
        // lodash cloneDeep(obj)
        const form = _.cloneDeep(this.addForm)
        form.goods_cat = form.goods_cat.join(',')
        // 处理动态参数
        this.manyTableData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(' ')
          }
          this.addForm.attrs.push(newInfo)
        })
        // 处理静态属性
        this.onlyTableData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals
          }
          this.addForm.attrs.push(newInfo)
        })
        form.attrs = this.addForm.attrs
        // 发起请求添加商品
        // 商品的名称必须是唯一的
        const { data: res } = await this.$http.post('goods', form)
        if (res.meta.status !== 201) {
          return this.$message.error('添加商品失败')
        }
        this.$message.success('添加商品成功')
        this.$router.push('/goods')
      })
    }
  },
  computed: {
    cateId () {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    }
  }
}
</script>

<style lang="less" scoped>
.el-checkbox {
  margin: 0 10px 0 0 !important;
}
.previwImg {
  width: 100%;
}
.btnAdd {
  margin-top: 15px;
}
</style>
